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Chemical Structure| 1346145-50-3 Chemical Structure| 1346145-50-3

Structure of 1346145-50-3

Chemical Structure| 1346145-50-3

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Product Details of [ 1346145-50-3 ]

CAS No. :1346145-50-3
Formula : C12H16FNOS
M.W : 241.33
SMILES Code : CC(S(/N=C(C1=CC=CC=C1F)\C)=O)(C)C

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Application In Synthesis of [ 1346145-50-3 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 1346145-50-3 ]

[ 1346145-50-3 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 349-43-9 ]
  • [ 1346145-50-3 ]
  • [ 1402412-87-6 ]
  • [ 1402412-88-7 ]
YieldReaction ConditionsOperation in experiment
Syntheses of the Intermediate Sulfinamide Esters A3.3 and A3.4In a dry apparatus under an inert atmosphere a solution of diisopropylamine (3.35 g, 101 mmol) in tetrahydrofuran (25 ml) was treated with n-butyl lithium (1.6M in hexane, 20.7 ml). The solution was stirred at -7° C. for 40 minutes. Thereafter, the solution was cooled to -75° C. and a solution of <strong>[349-43-9]ethyl 2-fluoropropanoate</strong> (3.98 g, 33.2 mmol) in tetrahydrofuran (5 ml) was added dropwise. After 40 minutes a solution of chlorotitanium triisopropoxide (8.64 g, 33.2 mmol) in tetrahydrofuran (15 ml) was slowly added dropwise. After 40 minutes at -72° C. to the orange colored solution was added dropwise a solution of (R)-2-methyl-propane-2-sulfinic acid [1-(2-fluorophenyl)-(E)-ethylidene]-amide (intermediate A2.1) (4.0 g, 16.6 mmol) in tetrahydrofuran (5 ml). Stiffing was continued at -72° C. for 4 hours, then the reaction mixture was kept at -20° C. for 17 hours. For the workup, the reaction mixture was quenched with an aqueous solution of ammonium chloride (13percent, 100 ml). The precipitate formed was diluted with water and the resulting mixture extracted three times with ethyl acetate. The organic layers were washed with brine, then combined, dried and evaporated at reduced pressure. Purification of the crude product by chromatography on silica gel using a 5:2-mixture auf heptane and ethyl acetate as the eluent yielded a 1:2-mixture of the (2S,3R)-2-fluoro-3-(2-fluoro-phenyl)-2-methyl-3-((R)-2-methyl-propane-2-sulfinylamino)-butyric acid ethyl ester (A3.3) and (2R,3R)-2-Fluoro-3-(2-fluoro-phenyl)-2-methyl-3-((R)-2-methyl-propane-2-sulfinylamino)-butyric acid ethyl ester (A3.4) (4.43 g, 74percent) as a light yellow oil. MS (ISP): m/z=362.2 [M+H]+.
Syntheses of the intermediate sulfinamide esters A3.3 and A3.4A3.3 A3.4 In a dry apparatus under an inert atmosphere a solution of diisopropylamine (3.35 g, 101 mmol) in tetrahydrofuran (25 ml) was treated with n-butyl lithium (1.6M in hexane, 20.7 ml). The solution was stirred at -7 °C for 40 minutes. Thereafter, the solution was cooled to -75 °C and a solution of <strong>[349-43-9]ethyl 2-fluoropropanoate</strong> (3.98 g, 33.2 mmol) in tetrahydrofuran (5 ml) was added dropwise. After 40 minutes a solution of chlorotitanium triisopropoxide (8.64 g, 33.2 mmol) in tetrahydrofuran (15 ml) was slowly added dropwise. After 40 minutes at -72 °C to the orange colored solution was added dropwise a solution of (R)-2-methyl-propane-2-sulfinic acid [l-(2-fluorophenyl)-(E)-ethylidene] -amide (intermediate A2.1) (4.0 g, 16.6 mmol) in tetrahydrofuran (5 ml). Stirring was continued at -72 °C for 4 hours, then the reaction mixture was kept at -20 °C for 17 hours. For the workup, the reaction mixture was quenched with an aqueous solution of ammonium chloride (13percent, 100 ml). The precipitate formed was diluted with water and the resulting mixture extracted three times with ethyl acetate. The organic layers were washed with brine, then combined, dried and evaporated at reduced pressure. Purification of the crude product by chromatography on silica gel using a 5:2-mixture auf heptane and ethyl acetate as the eluent yielded a l :2-mixture of the (2S,3R)-2-fluoro-3-(2-fluoro-phenyl)-2-methyl-3- ((R)-2-methyl-propane-2-sulfinylamino)-butyric acid ethyl ester (A3.3) and (2R,3R)-2-Fluoro-3- (2-fluoro-phenyl)-2-methyl-3-((R)-2-methyl-propane-2-sulfinylamino)-butyric acid ethyl ester (A3.4) (4.43 g, 74percent) as a light yellow oil. MS (ISP): m/z = 362.2 [M+H]+.
Syntheses of the intermediate sulfinamide esters A3.5 and A3.6A3.5 A3.6In a dry apparatus under an inert atmosphere a solution of diisopropylamine (3.35 g, 101 mmol) in tetrahydrofuran (25 ml) was treated with n-butyl lithium (1.6M in hexane, 20.7 ml). The solution was stirred at -7 °C for 40 minutes. Thereafter, the solution was cooled to -75 °C and a solution of <strong>[349-43-9]ethyl 2-fluoropropanoate</strong> (3.98 g, 33.2 mmol) in tetrahydrofuran (5 ml) was added dropwise. After 40 minutes a solution of chlorotitanium triisopropoxide (8.64 g, 33.2 mmol) in tetrahydrofuran (15 ml) was slowly added dropwise. After 40 minutes at -72 °C to the orange coloured solution was added dropwise a solution of (R)-2-methyl-propane-2-sulfinic acid [l-(2-fluorophenyl)-(E)-ethylidene]-amide (intermediate A2.3) (4.0 g, 16.6 mmol) in tetrahydrofuran (5 ml). Stirring was continued at -72 °C for 4 hours, then the reaction mixture was kept at -20 °C for 17 hours. For the workup, the reaction mixture was quenched with an aqueous solution of ammonium chloride (13percent, 100 ml). The precipitate formed was diluted with water and the resulting mixture extracted three times with ethyl acetate. The organic layers were washed with brine, then combined, dried and evaporated at reduced pressure. Purification of the crude product by chromatography on silica gel using a 5:2-mixture auf heptane and ethyl acetate as the eluent yielded a l:2-mixture of the (2S,3R)-2-fluoro-3-(2-fluoro-phenyl)-2-methyl-3- ((R)-2-methyl-propane-2-sulfinylamino)-butyric acid ethyl ester (A3.5) and (2R,3R)-2-fluoro-3- (2-fluoro-phenyl)-2-methyl-3-((R)-2-methyl-propane-2-sulfinylamino)-butyric acid ethyl ester (A3.6) (4.43 g, 74percent) as a light yellow oil. MS (ISP): m/z = 362.2 [M+H]+
 

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